Film-feeding mechanism consecutive-view apparatus.



Patented Nov. 7, |899.

No. 636,7ls.

H. CASLER & J. A. PBUSS.

FIL'M FEEDING MECHANISI FOR CDNSECUTIVE VIEW APPARATUS.

(Application filed Kay 9, 1899.)

2 Shaets-Sheet l.

(No Model.)

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No. 636,7l6. Patented Nov. 7, |899.- H. CASLER &. J. A. PROSS.

FILM FEEDING MECHANISM FUR CONSEGUTIVE VIEW APPARATUS.

(Application led May 9, 1899.) fNo Model.) 2 Sheets-Sheet 2.

WITNESSES: INVENTORS Y 9% .%m-r` ATTORNEYS UNITED STATES PATENT OFFICE.

HERMAN OASLER AND JOHN A. PROSS, OF OANASTOTA, NEV YORK, ASSIGN- ORS TOTHE AMERICAN MUTOSCOPE COMPANY, OF NEV JERSEY.

FlLM-FEEDlNG NIECHANISM FOR CONSECUTlVE-VIEW APPARATUS.

SPECIFICATIONforming part of Letters Patent No. 636,716, dated November7, 1899.

Application filed May 9, 1899. Serial No. 716,118. (No model.)

To a/ZZ whom it '11a/Cty concern.:

Be it known that we, HERMAN OASLER and JOHN A. PROSS, citizens of theUnited States, residing at Oanastota, in the county of Madi- 5 son andState of New York, have invented certain new and usefulImprovementsinFilm- Feeding Mechanism for Consecutive -View Apparatus; and wel dohereby declare the following to be a full, clear, and exact dexoscription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same. Our inventionrelates generally to improvements in consecutive-view apparatus such I5as employ a exible picture-strip or film, and

relates particularly to improvements in mechanism employed for varyingthe rate of feeding of such picture-strip or film.

Our invention consists in the novel means 2o employed for varying therate of feeding of the picture-strip or film.

The objects of our invention are to improve the devices employed forvarying` the rate of feeding of films or picture-strips in consecu- 2 5tive-view apparatus and to render the same as simple and inexpensive aspossible. These objects are attained in the invention herein described,and illustrated in the drawings which accompany and form a part of this3o specification, in which the same referencenumerals indicate the sameor corresponding parts, and in which- Figure 1 is a verticallongitudinal section of a consecutive-view apparatus constructed 35 inaccordance with ourinvention, the section being taken through theoptical axis; and Fig. 2 is a detail horizont-al section of theapparatus.

In the drawings, 1 is the outer case of a 4o consecutive-view-projectingapparatus; 2, the objective-lens thereof; 3, alight-opening in the rearof the case, concentric with the optical axis, and e a shelf (thegreater portion of which has been broken away) upon 45 which a suitableprojecting-lantern may be placed.

5 is a supply-reel, revolubly mounted, from which the film may be drawn,and 6 is a winding-up reel, likewise revolubly mounted.

7 is a guide-pulley.

8 is a support located transversely of the path of the rays of light,but having an opening for the passage of light, and 9 is a springpressedframe surrounding the light-opening in the plate 8 and tending to pressagainst 55 said plate. The frame therefore serves to hold the filmsteady while being exposed and to offer some slight friclionalresistance to the passage of the film across the optical field.

10 and 11 are two segmental feeding-rollers 6o for feeding the filmforward intermittently. The major portion of the face of each of theserollers is cut away, as shown, leaving a working surface extendingthrough only a portion of the circumference. Roller 10 is mounted 65upon and keyed to a shaft 12, and roller 11 is mounted upon and keyed toa shaft 13. Shaft 13 is driven from shaft 12 by means of two spiralgears 14 and 15. Gear 14 is fast upon shaft 12, but gear 15 is laterallymovable upon 7o shaft 13, transmitting motion to said shaft by means ofa key 16. Gear 15 has a grooved hub engaged by a yoke 17, mounted upon arock-shaft 18, which projects through the front of the case 1 and isprovided with an 75 operating-handle 19.

The shaft 12 is the driving-shaft 0f the apparatus. A shutter 2O isdriven from shaft 12 by a shutter-shaft 21 and suitable bevelgears. Abelt 22 runs over a pulley 23 on 8o shaft 12 and over a pulley 24,loosely mounted upon the shaft 25, upon which reel 6 is mounted. Thisshaft is driven from pulley 211- by means of an adjustable frictionaldriving device 26, which permits pulley 24 to slip 85 upon shaft 25 whenall slack in the film has been taken up.

In order to prevent the strain upon the film produced by the tendency ofthe reel G to revolve from causing motion of the film through 9o thefield of the apparatus to occur during the intervals of exposure, whenthe film should be absolutely stationary, the film is passed about aseries of snubbing-posts 27, which suffice to prevent the strain of thewinding-up reel 95. from reaching that portion of the film. which passesthrough the optical axis.

The operation of the apparatus is as follows: When shaft 12 is revolved,rollers 10 and 11 are also revolved, roller 11 being` driven Ico fromshaft 12 through gears 14 and 15. The .film is drawn intermittently fromthe reel 5 across the optical axis and is wound upon the reel 6, whichslips whenever the iilm is drawn taut. If it be desired to vary slightlythe feeding of the iilm, so as to make the suecessive pictures on thefilm register accurately with the exposure-opening, the handle 19 may bemoved in the one direction or the other, according as it is desired tomake the lm move more rapidly or more slowly. The eii'ect of suchmovement of the handle 19 is to move gear 15 laterally with respect togear 14, thus moving the segmental roller 11 backward or forward, as thecase may be, with respect to its companion roller 12-that is to say, bymoving the gear 15 upon its shaft the roller 11 is given a certainamount of angular advance (positive and negative) varying with theposition of the gear 15. The effect of varying this angular advance isto vary the length of the period in each revolution of the two rollers10 and 11 during which both are in contact with the film, thus varyingthe length of film fed forward at each revolution of said rollers.

Having thus completely described our invention, what we claim, anddesire to secure by Letters Patent, is

1. In a consecutive-view apparatus, the combination, with shaftsprovided with segmental feeding-rollers adapted to contact with apicture-strip or film passing between them, of means for giving one ofsaid rollers angular advance with respect to the other roller, therebyvarying the duration of the period of joint contact of said rollers withthe strip or film, substantially as described.

2. In a consecutive-view apparatus, the combination, with shaftsprovided with segmental feeding-rollers, Vadapted to contact with apicture-strip or film passing between them, of intermeshing spiral gearsmounted upon said shafts, and means for moving one of said gearslaterally upon its shaft, thereby advancing one of said rollersangularly with respect to the other, substantially as described.

3. In a consecutive-view apparatus, the combination,.with parallelshafts provided with segmental feeding-rollers, adapted to contact witha picture-strip or ilm passing between them, of intermeshing spiralgears mounted upon and connected to said shafts, and adapted to transmitpower from one shaft to the other, and means for moving one of saidgears laterally with respect to the other, 'thereby advancing one ofsaid rollers angularly with respect to the other, substantially asdescribed.

In testimony whereof we hereunto afiix our signatures in the presence oftwo witnesses.

HERMAN CASLER. JOHN A. PROSS.

Vitnesses:

CLARENCE L. HOBART, WM. WAGNER.

